SI Webservice接口 工序汇报 创建人以及备注问题

通过SI发布的webservice服务是动态表单服务的生成工序汇报。
多个用户传入的创建人不起作用，默认的都是第一个api认证的用户信息。

后来尝试写入到备注Model.FDescription以及sfcDetail[0].FOptRemark，再通过数据库方式更新，但都保存不到数据库中，为空值，不知为何？请高手帮忙。。。。
部分代码如下：

ServiceReference.SFC_OperationReport_GenerateOperationReport sfc = new SFC_OperationReport_GenerateOperationReport();
sfc.Model = new SFC_OperationReport();
//sfc.Model.FCreatorId = new SFC_OperationReport_SEC_User() { FUserAccount = user };//制单人
//sfc.Model.FCreatorId = new SFC_OperationReport_SEC_User() { FName = user };
sfc.Model.FDate = DateTime.Now.Date;//单据日期
sfc.Model.FPrdOrgId = new SFC_OperationReport_ORG_Organizations() { FNumber = FPrdOrgId };//组织
//sfc.Model.FID = 0;// long.Parse("0");
sfc.Model.FCreateDate = DateTime.Now.Date;
sfc.Model.FModifyDate = DateTime.Now.Date;
sfc.Model.FModifierId = new SFC_OperationReport_SEC_User() { FName = user };//{ FUserAccount = user };//制单人
sfc.Model.FCancelStatus = "A";
sfc.Model.FDocumentStatus = "Z";
sfc.Model.FWorkShopID = new SFC_OperationReport_BD_Department() { FNumber = sFWorkShopID };
sfc.Model.FBillTypeID = new SFC_OperationReport_BOS_BillType() { FNumber = "GXHB01_SYS" };
sfc.Model.FIsEntrust = false;//组织受托加
sfc.Model.FDescription = user;
SFC_OperationReport__FEntity[] sfcDetail = new SFC_OperationReport__FEntity[1];
sfcDetail[0] = new SFC_OperationReport__FEntity();
//sfcDetail[0].FENTRYID = 0;
sfcDetail[0] = new SFC_OperationReport__FEntity();
sfcDetail[0].FOptPlanId = long.Parse(OptPlanId);//工序计划ID
sfcDetail[0].FOptPlanOptId = long.Parse(OptPlanOptId);//工序计划工序ID
//sfcDetail[0].FFailQty = 1;//完工数量
//sfcDetail[0].FReworkQty = 1;
sfcDetail[0].FQuaQty = decimal.Parse(sFQuaQty);//完工数量
sfcDetail[0].FFinishQty = decimal.Parse(sFQuaQty);
sfcDetail[0].FOptRemark = user;